WO2004105272A1 - Application handover method in mobile communication system, mobile management node used in the mobile communication system, and mobile node - Google Patents

Application handover method in mobile communication system, mobile management node used in the mobile communication system, and mobile node Download PDF

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Publication number
WO2004105272A1
WO2004105272A1 PCT/JP2003/006252 JP0306252W WO2004105272A1 WO 2004105272 A1 WO2004105272 A1 WO 2004105272A1 JP 0306252 W JP0306252 W JP 0306252W WO 2004105272 A1 WO2004105272 A1 WO 2004105272A1
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WO
WIPO (PCT)
Prior art keywords
mobile
node
information
type
application
Prior art date
Application number
PCT/JP2003/006252
Other languages
French (fr)
Japanese (ja)
Inventor
Hideaki Ono
Keiichi Nakatsugawa
Yuji Matsumoto
Original Assignee
Fujitsu Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Limited filed Critical Fujitsu Limited
Priority to PCT/JP2003/006252 priority Critical patent/WO2004105272A1/en
Publication of WO2004105272A1 publication Critical patent/WO2004105272A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/34Reselection control
    • H04W36/38Reselection control by fixed network equipment
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance or administration or management of packet switching networks
    • H04L41/50Network service management, i.e. ensuring proper service fulfillment according to an agreement or contract between two parties, e.g. between an IT-provider and a customer
    • H04L41/5019Ensuring SLA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network-specific arrangements or communication protocols supporting networked applications
    • H04L67/06Network-specific arrangements or communication protocols supporting networked applications adapted for file transfer, e.g. file transfer protocol [FTP]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00Application independent communication protocol aspects or techniques in packet data networks
    • H04L69/30Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32High level architectural aspects of 7-layer open systems interconnection [OSI] type protocol stacks
    • H04L69/322Aspects of intra-layer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/329Aspects of intra-layer communication protocols among peer entities or protocol data unit [PDU] definitions in the application layer, i.e. layer seven
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data session or connection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/17Selecting a data network PoA [Point of Attachment]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/02Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08Mobility data transfer
    • H04W8/087Mobility data transfer for preserving data network PoA address despite hand-offs
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W80/00Wireless network protocols or protocol adaptations to wireless operation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W80/00Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04Network layer protocols, e.g. mobile IP [Internet Protocol]

Abstract

The invention relates to a handover technique in a mobile communication system. For example, a mobile management node (1) selects an access line used for transferring application data to be transferred to a mobile node (2) from a communication party node (3, 4, 5) depending on the type (such as http, frp, or voip) of the application data. The application data is transferred through the selected access line. The access lines simultaneously connected to the mobile node (2) can be used individually depending on the type such as http, ftp, or voip of the application. As a result, the quality desired by the user can be ensured, and the network can be used effectively.

Description

Mobility management node used in the application handover method and the mobile communication system in a mobile communication system and mobile nodes art

The present invention is, for example, a cellular phone and PDA (Personal Digital Assistants) mobile terminals in thermopile IP mobile communication network are use the (Internet Protocol) technology to the mobile management (mobile Roh one de) Akira, concurrently multiple access, such as Intafue Ichisu technique suitable for have use in a mobile communication system using a mobile node capable of connecting to (§ access line). Written BACKGROUND

With the recent spread of the Internet, communication has become widespread with IP. Moreover, thermopile IP to enable mobile communication has been examined by IETF (Internet Engineering Task Force), the mobile communication also becoming possible using a thermopile IP using IP. Thermopile IP, the mobile terminal to the HA (Home Agent) as a mobile management node: destination Adoresu indicating the current position of the (MN Mobile Node); by registering the (CoA Care of Address), MN moves also is a technology to continue available-the communication.

Hereinafter, with reference to FIG. 35, that describes the conventional communication method using a thermopile IP.

First, MN is to be connected to the access router (AR 1) under subnet network (mouth one local link). Destination address the MN at this time is used (CoA) is CoAl. MN, when moved to the link of AR 1, to obtain or generate the destination § address CoAl, it location registration message (BU: Binding Update) using the position information cache of HA (BC: Binding Cache) It is registered to. CN (Correspondent Node) is a communication partner terminal, MN Home Address: sending a packet to (HoA Home of Address) and the destination. This packet is delivered to HA, HA is intercepts this Baketsuto, and transmits the encapsulated in the destination Adoresu CoAl resulting of the reference and search the location information caching of the HA. This encapsulation packet, in order to move Dosaki address of the current MN has become a CoAl, delivered to MN. MN receives this packets, by solving the capsule (decapsulates), by taking out the original Rupaketto addressed to the HoA, it interpreted as a Baketsuto that arrived addressed to its own HoA. In this manner, MN becomes possible packet reception in the destination.

Then, the MN has moved further links another access router (AR 2). Then, MN is, that generates the address CoA2 to be used in the destination (link AR 2). MN is re-register the HA by the destination address CoA2 location registration message. Yotsute thereto, destination Adoresu about the MN registered in the position information cache of HA is updated CoA2 from CoAl.

Meanwhile, CN, like before, and transmits the home address (HoA) packets destined for MN. This packet is the HA, this time is transferred is force encapsulates in the destination address CoA 2. Capsulated in the destination Adoresu CoA2 packets are delivered to MN, MN is decapsulates it takes out the Baketsuto directed to its own HoA. This is because a packet to the same destination as the previous packet, moving MN is capable of receiving packets from the CN without upper application aware of the movement of the MN. In this way, moving the MN, MN "handover switching of intact communication with the CN Ru can continue (without disrupting applications) [such packet transfer path (access line) It is referred to as a "].

However, currently various access networks have been developed and put to practical use. For example, the third generation mobile communication network (hereinafter, referred to as 3 G), in the communication system second generation mobile communication network (Japan in this PDC (Personal Digital Cellular), in Europe called GSM (Global System fo r Mobile Communications) , hereinafter referred to as 2 G), PHS (Personal Handyphone System), a wireless LAN (wireless Local Area etwor k) access network using Ethernet (registered trademark) connection that is used in the enterprise, ADSL (Asymmetric Digital Subscriber Line ;. various access networks such as or ISDN (Integr ated Services Digital network) can be take advantage under this environment, the user, it is also possible to always use by selecting an optimal access network It has become.

For example, as shown in Non-Patent Document 1 below, while using the motor pile personal computer or the like, so as to connect automatically switched to the best network remains situ continuing the communication, large-capacity accompanying when you download a file in a high-speed communication of the wireless LAN, and so on in the PHS network to the normal communication, without being conscious of whether the user is connected to any current network, optimal Nettowa one-click environment in can communicate.

As another prior art mobile communication system, there is a technique shown in Patent Documents 1 and 2 below. Patent Document 1 described technology (multimode universal mobile telecommunications system) is a cellular system, in a system in which a variety of mobile communication systems satellite mobile communication systems combined compositely, against the mobile terminal decides viii Ndooba , at least one parameter Ichita other connection quality (e.g., price, capacity, transmission speed, availability) is that performed based on.

Thus, the technique described in Patent Document 1, the mobile terminal is continuously scanning the available communication network (circuit switching services, packet-switched data services, wireless LAN, etc.) during the movement, for example, a packet if the people of the destination of the communication network exchange de Isseki during the service is only to provide the same service at a low price than the moving source of the communication network, it is possible to switch the connection to the destination of the communication network . The information about the service prices are notified to the mobile terminal, for example, by a common channel.

In contrast, the technology described in Patent Document 2 (communication setting method and an electronic device), the wireless LAN and Bluetooth (using the 2.4GHz band radio transmission method) or the like of the wireless communication means its playable thermopile PC (the electronic device) is , previously registered in accordance with the priorities of the wireless network configuration, it detects the current connectable network (access point), connection setup [IP address for the home office to detected network, main Ichiru soft setting, network settings for the home LAN, is that to change the service provider of personal contract (ISP) settings, and the like]. Thus, the technology of Patent Document 2, even when the network environment changes, it is possible to realize a transition to a different network environments Patent Document 1

Kohyo 1 1 5 0 1 7 8 3 JP

Patent Document 2

JP 2 0 0 2 2 5 2 6 2 0 No.

Non-Patent Document 1

Fujitsu Ltd., "Japan's first! Optimal network to automatically switch middleware" Seamlesslink V1.0J new release ", [online], 2003 January 2 7 days, [2003 April 2 5 days Search, Intanettoku URL: http: //pr.fujitsu.com/jp/new s / 2003/01 / 27.html> However, in so far of thermopile IP technology, home address with the terminal (MN) (HoA) is always one, the destination address (CoA) also 必 1 Tsudemeru corresponding thereto. Therefore, http (hyper text transier protocol), ftp (file transfer protocol), voip (voice over IP) or the like of the service - Bisuzuno. RIQUET Te one Deployment i> C, it is been made impossible to selectively use a plurality of access lines to be simultaneously connected to the MN.

That is, as shown in FIG. 3 6, home address HoA and the destination address CoA to HA, in the state where capital is registered, MN is a html data § access the Web (Web) server 1 0 0 when receiving, when performing communication by CN 2 0 0 and voip, even if the file server 3 0 0 any when downloading files by ftp, the destination of the packet addressed to the MN is the home address HoA, this since HA is to transfer the encapsulated just one destination Adoresu CoAl or CoA2 at the same time, MN, via the always only one access line in the same time, only to receive a plurality of packets It can not be the (not only uniform handover).

Incidentally, such problems are arising as well keep the technology described in Patent Documents 1 and 2. That is, any of these technologies, the mobile terminal performs the connection by detecting a use in the destination (connection) capable communication networks (access line), but those this connection that uniformly performed by the application because there, still, the mobile terminal is not able to communicate only via the always only one of the access lines at the same time. Therefore, also in this case, http, ftp, depending on the service application, such as voip, it is it is not possible to selectively use a plurality of access lines to be simultaneously connected.

The present invention has been in view conceived of such problems, the mobile terminal in which a plurality of access lines are simultaneous connections, type of service application Ke Shiyon which the mobile terminal is simultaneously used (data) (attribute) and an object thereof is to so enable the Baketsuto transfer by selecting an optimal access line respectively in accordance with the. Disclosure of the Invention

To achieve the above object, Aburike Shonhando ICHIBA method in a mobile communication system of the present invention, a mobile communication in which a plurality of access lines equipped with mobile nodes which can be connected to a plurality of correspondent nodes simultaneously communicate simultaneously in the system, from the correspondent node based separate type of application data to be forwarded to the mobile node, and select the access line to be used for the transfer of the applique one Deployment data transfer of the application data by access lines selected and characterized by performing.

Here, provided the move management Roh once said mobile communication system to manage de Isseki transfer path to the mobile node, the mobility management node receives the Apurikeshi Yung data addressed the mobile node, the identifies the type of the application data, it is also possible to make a selection of the access line based on the identification result.

Further, the mobile node, by an access line available at the current position, notifies the correspondence between the destination address information identifying the type information and the access line of the application data to be received in the access line to the mobile management node and, 該移 dynamic management node, it is also possible to make a selection of the access line in based on the and the correspondence between the identification result notified from the mobile node.

Furthermore, corresponds relationship between classification information and the destination address information of the application data may be managed by the mobile management node, it may be managed by the mobile node. Further, the mobile node as the destination address information, used for reception of the application data for each type of the application de one evening to a single mobile node identifier assigned Ri by the said mobility management node Adore scan information access line (hereinafter, referred to as the line address information) to generate, also in monkey be notified of the set of the 該回 line address information and 該A Purike one Chillon data type information to the mobility management node.

Further, the mobile node assigns a plurality of mobile nodes identifier for each type of the application data, as the transfer destination address information to generate a line Adoresu information used for reception of the applique Activation data, the mobile node a set of the identifier and 該回 line address information may be notified to the mobile management node. Further, the mobile node, when receiving that signal the application data from the correspondent node to identify the type of the application data, and notifies the forwarding address information corresponding to the identification result to the correspondent node, the communication partner node, the application data destined later the mobile node can also be transmitted to said transfer Okusaki Adoresu information notified from the mobile node.

Furthermore, the mobile Roh once, when the correspondent node receives Isseki the application des that sent to identify the type of the application data, the transfer destination Adoresu information corresponding to the identification result to the mobile management node notified, the mobility management node, the application data evening of the mobile addressed node received from the correspondent node after, also in monkey be transmitted to the transfer destination address information notified from the mobile node.

Further, the mobile node, after adjusting the type information § application data to be'll start a communication with the correspondent node, a set of the said type information and 該回 line Adoresu information to the mobility management node it is also possible to be notified.

Further, the mobile node, after adjusting the type information of the application data to be'll start a communication with the correspondent node, select the mobile node identifier for the type information, and the mobile node identifier a set of the 該回 line Adoresu information may be notified to the mobile management node.

Furthermore, the mobile management node, if the application data evening type destined said mobile node receiving can not be identified, may also select Defuoru bets access line which is set in advance of the access line.

Furthermore, the mobile management node is a node having a home agent function in the thermopile IP, preferably the mobile node is a node having a client function in the thermopile IP.

Next, the mobility management node of the present invention, a plurality of access lines are used in a mobile communication system having a mobile node that can be connected to the communication of multiple partner nodes simultaneously communicate simultaneously, the data to the mobile node a node that manages the transfer path, and the data type identifying means for identifying a type of Apurike one Chillon data to be forwarded to the mobile Roh one de from vent signal correspondent node, the identification result by said data type identifying means based on, it is characterized in that a Akuse scan line selection means for selecting an access line used to transfer the application data.

Wherein the access line selecting means includes a Adoresu information management means for managing a correspondence relationship between destination § address information specifying an access line used to transfer type information and the application de Isseki of the application data, determine the appropriate forwarding address information based on the identification result by the correspondence between the 該De Isseki type identification means managed by the Adoresu information management means, destined said mobile node from said correspondent node the application data may be configured to include a de Isseki transfer processing unit for transferring the addressed to the destination address information.

Further, the address information management means, the mobile node that comes is notified by an access line available at the current position from the mobile node in the classification information and said access line applique one Deployment data to be received in the access line but it may also be provided with a position information cache that holds the correspondence between the destination address information to identify.

Furthermore, the location information cache, as the correspondence between the address of the access line information used for reception of the application data generated in the mobile node for each type of the application data to a single mobile node identifier it may be configured to hold a set of the said applique one Shonde evening class information together with the address information notified from the mobile node, assigned to the mobile node for each type of the application de Isseki it may be configured to hold a set of the access line of the address information used for reception of one the application de Isseki of the mobile node identifier.

Further, the access line selection means, if the type of the application de Isseki addressed the mobile node received in the data type identification unit can not be identified, selecting the default access line which is set in advance among the Akuse scan line Defuoru Bokukai line selecting means for may comprise a.

Next, the mobile node of the present invention, a mobile management node for managing data transfer route of the plurality of access lines is simultaneously connected to a plurality of correspondent nodes and simultaneous communication capable mobile node and the mobile node a node for use in a mobile communication system having a plurality of line interfaces corresponding to the plurality of access lines, by an access line can be used in current position, line fin evening corresponding to the access line Fuesu and a correspondence relationship between destination Adoresu information specifying a type information and said Akusesu line application data to be received in and characterized in that a moving management means for notifying the mobility management node.

Here, the mobile management means, as the transfer destination address information, to the application • the application de Isseki reception for each type of data for a single mobile node identifier assigned by the mobility management node used § address information of the access line (hereinafter, referred to as the line address information) and the application-specific single line Adoresu information generating means for generating a set of the 該回 line Adoresu information and the application de Isseki type information to the mobile management node it may be configured to include a first transfer destination Adoresu information notifying means for notifying.

Furthermore, the mobile management means, a plurality of mobile Roh for each type of the application data - allocates the de identifier, as the transfer destination address information, the applique - access line of the address information used for reception of Chillon data (hereinafter, equipped with an application-specific node identifier generating means for generating a) of the line address information, and a second rolling Okusaki address information notification means for notifying a set of the said mobile node identifier and 該回 line address information to the mobile management node configuration may be.

Further, the mobile node receives the application de Ichita from said mobility management node, provided with a data type identifying means for identifying a type of the application data, is the mobile management means, by 該De Isseki identification means identification result response Ji and the transfer destination Adoresu information, first transfer notifying app Keshiyonde Isseki addressed the mobile node subsequent to the correspondent node to the communication partner nodes so as to sent to the transfer destination address information provided with a previously Adoresu information specifying unit may be configured. Furthermore, the mobile management means, a transfer destination Adoresu information corresponding to the identification result by 該De Isseki type identification means, the application data of the mobile addressed node the mobile management node is received from the correspondent node after or it may be configured to include a second transfer destination Adoresu information specifying means for notifying so that the mobile management node to sent to the transfer destination address information.

Furthermore, the mobile management means includes type information adjusting means for adjusting the type information applique one Deployment data Attempting to start the communication with the correspondent node, the said first transfer destination Adoresu information notification means , a set of the said type-specific information and 該回 line Adoresu information after adjustment by said species-specific information adjusting means may be configured to notify to the mobile management node.

Furthermore, the mobile management means, moving with respect to the type information and type information adjusting means for adjusting the type information of the application data to be'll start communication, after adjustment by said species-specific information adjusting means between the correspondent node includes a mobile node identifier selection means for selecting a node identifier, the second transfer destination address information notification means, the mobile management a set of the mobile node identifier and 該回 line Adoresu information selected by 該移 dynamic node identifier selection means it may be configured to notify the node. BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a proc diagram showing a configuration of a mobile communication system according to a first embodiment of the present invention.

Figure 2 is a functional block diagram showing the configuration of a home agent node (HA) shown in FIG.

Figure 3 is a functional block diagram showing a configuration of a mobile node (MN) shown in FIG. Figure 4 is a diagram for explaining operation of the mobile communication system of the first embodiment (the applique one Deployment eight Ndo Pas).

5 and 6 are views showing the location registration message example used in the first embodiment, respectively.

Figure 7 is a diagram showing an example of registration of the location information cached in the first embodiment. 8 to 1 0 is a view for explaining the operation of the mobile communication system of the first embodiment (the application Chillon handover), respectively.

Figure 1 1 is a flow chart for explaining a position registration message processing in the HA of the first embodiment.

1 2 is a flow one chart for explaining the Baketsuto transfer processing in HA of the first embodiment.

Figure 1 3 is a flow one Chiya one Bok of order to explain the location registration message transmission process at the time of movement of the MN in the first embodiment.

Figure 1 4 is a Furochiya one bets for explaining a position registration message temporary transmission processing during voip communication of the MN in the first embodiment.

Figure 1 5 is a diagram showing a location registration message example used during voip communication start in the first embodiment. '

Figure 1 6 is a sequence diagram illustrating the operation of the mobile communication system according to a first modification of the first embodiment (Lu Bok optimization).

Figure 1 7 is a sequence diagram illustrating the operation of the mobile communication system according to a second modification of the first embodiment (access line specified communication After the start).

Figure 1 8 is a sequence diagram illustrating the operation of the mobile communication system of a third modification of the first embodiment (string one Mindasa one bis).

Figure 1 9 is a proc diagram showing a configuration of a mobile communication system according to a second embodiment of the present invention.

2 0 is a functional block diagram showing a home agent node (HA) configuration shown in Figure 1 9.

Figure 2 1 is a functional block diagram showing a configuration of a mobile node (MN) shown in FIG 9. 2 2 is a diagram for explaining operation of the mobile communication system of the second embodiment (application hand O over server). 2 3 and 2 4 are shown to view the location registration message example used in the first embodiment, respectively. .

Figure 2-5 is a diagram showing an example of registration of the location information cached in the second embodiment. Figure 2. 6 to FIG. 2 8 is a diagram for explaining the operation of the mobile communication system (applique over Chillon handover) of the second embodiment, respectively.

2 9 is a flowchart for explaining a position registration message processing in the HA in the second embodiment.

3 0 is a flow one Chiya one Bok for explaining packet transfer processing in HA in the second embodiment.

3 1 is a Furochiya one bets order to explain the location registration message transmission process at the time of movement of the MN in the second embodiment.

3 2 is a sequence diagram illustrating the operation of the mobile communication system according to a first modification of the second embodiment (Lu Bok optimization).

Figure 3 3 is a sequence diagram illustrating the operation of the mobile communication system of the second modification of the second embodiment (access line specified communication After the start).

3 4 is a sequence diagram illustrating the operation of the mobile communication system of a third modification of the second embodiment (string one Mindasa one bis).

3 5 and 3 6 is a diagram of order to explain the communication method according to a conventional thermopile IP respectively. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, with reference to the drawings illustrating the embodiments of the present invention.

[A] Description of First Embodiment

Figure 1 is a proc diagram showing a configuration of a mobile communication system according to a first embodiment of the present invention, the mobile communication system shown in Figure 1, the home agent having a home agent function in Mobile_IPv6 (Mobile -Internet Protocol version 6) node (HA) 1, the mobile node having a client function in the mobile-IPv6 (MN) 2, the MN 2 can Isseki le on the Internet that can be accessed by a wireless (Akuse through evening: AR) 3- 1, 3 - 2 , 3 - 3 (hereinafter, if you do not want to distinguish between these is referred to as "AR 3" to the single), web (web) server 4 that provides a web service (content delivery services) to the MN 2, MN 2 a is Ya voip is configured to include the file server 6 or the like to provide a file I le transfer service by ftp, etc. to the correspondent node (CN) 5 and MN 2 which communicates with a predetermined protocol such as ftp. Here, HA 1 the current location information of the MN 2: the position of the [CoA destination (destination) address information is a by access line Adoresu information (line Adoresu Information)] Information Canon Mesh (Binding Cache) 1 1 manage, the web server 4 and CN 5 of the data packets of MN 2 destined sent from the file server 6 addressed HA 1 (hereinafter, simply referred to as "packet") receives the position information cache the packet the latest CoA of MN 2 managed by 1 1 has a function of transferring encapsulated to MN 2. Incidentally, in FIG. 1 is not shown only one of the MN 2, actually HA 1 one can you MN 2 managed separately each movement of a plurality of MN 2.

However, in the present embodiment, the HA 1 (position information cache 1 1), MN 2 can be connected access line (e.g., wireless LAN, PHS, 3G, Bluetooth, etc.) a plurality of line interfaces to equip according to ( hereinafter simply referred to as "interface") 2 1, 2 2, 2 3 separately, as well as managing the MN 2 CoA (CoAl, CoA 2, CoA 3), they CoA separately http the MN 2 can be utilized, ftp, voip etc. Sa velvetleaf scan application (data) (hereinafter, simply referred to as "application") is adapted also to manage the attributes of (type). That, MN 2 of the present embodiment, as discussed later, and summer to allow registration to HA 1 the CoA interface 2 1, 2 2, 2 3 separately generates and.

Specifically, the HA 1 (position information cached 1 1), the MN 2 Home § address (mobile node identifier: HoA) and combinations http, ftp, and type information shows the application type, such as voip (attribute code) information is, as search keys of the position information cache 1 1, are stored in association with the value of the CoA corresponding thereto. That is, the position information cache 1 1 This is managing a correspondence between the destination address information for identifying the access lines using attribute co one de of applique one Deployment data and the transfer of the Abu Rikeshi Yon data and (CoA) It plays the function of the address information management unit for.

Thus, when the packet addressed to MN 2 arrives at HA 1, the HA 1, the value of the port number included in its packet header (e.g., 80, https if 443, pop3 if 110 or the like if http) Referring to it allows to identify the attribute code, and a combination of the attribute code identifying the home address (HoA) is the destination of the packet to create a search key, searches the position information cache 1 1 by the search keys it is, as possible out to obtain a CoA corresponding to the type of application data addressed to MN 2. Thus, HA 1, if withered line transfer to the capsule the received packet in its CoA, to the desired MN 2, it is possible to deliver packets with the desired access line through why according to the application type.

To realize such a function, HA 1 of the present embodiment, in addition to the position information cache 1 1 described above, for example, as shown in FIG. 2, Baketsuto identifying unit 1 2, message processing unit 1 3 It is configured to include a Baketsuto processor 1 4 and packet Bok transfer unit 1 5.

Here, the packet identification unit (de Isseki type identification unit) 1 2 analyzes the header portion of the received packet, the received packet is its own node (HA 1) whether the packet addressed to own node addressed bucket Bok a which was the received bucket Bok location registration message when - di (Binding Update) identify packets of control messages and is whether force ,, MN 2 addressed whether (application data) such as as well as it has a function of identifying the application type of the received packet (de Isseki type) from the port one preparative number.

Incidentally, in the packet identifying unit 1 2, the received packet is identified as not a packet addressed to Jinoichido (HA 1), the received packet through the packet processing unit 1 4 and the packet transfer unit 1 5 it is forwarded to another destination node, the received packet is identified as a location registration message addressed to its own node, the received packets are passed to the message temporary processor 1 3, MN 2 addressed If as a packet Ru is identified, the received packet is passed to the packet processing unit 1 4.

The message processing unit 1 3 is for processing the control message time from the packet identifying unit 1 2, the position information cache of CoA of MN 2 to which the control message is included in the message if the location registration message 1 1 registration and update and to, but has a function of performing the deletion of unnecessary CoA, this time, the MN 2 ho one Muado less (HoA), and the attribute code identified in the packet identifying unit 1 2 It is adapted to carry out the registration, update and deletion of the CoA for each combination of.

Therefore, in this embodiment, the position registration message transmitted by the MN 2, and HoA, and CoA, as if to reflect this CoA to any application type (associates) are set (specified) by the MN 2 summer and, the message processing unit 1 3, was it would Nau line registration and updating of the CoA for connexion position information cache 1 1.

That is, the position information cache 1 1, and the attribute code of the application data to be received at its incoming is notified by the location registration message from the MN 2 by the available access line at the current position, its access lines in MN 2, correspondence is adapted to be held between the transfer destination address information identifying the § click Seth line (CoA).

Next, Baketsuto processor 1 4 searches receives a packet addressed to MN 2 from the packet identifying unit 1 2, while referring to the positional information cache 1 1, the CoA of the MN 2 adapted to the application type of the packet · determining, as it has a function to encapsulate Baketsuto by its CoA, Baketsuto encapsulated is delivered to Baketsuto transfer unit 1 5. Incidentally, the packet processing unit 1 4, when the packet identifying unit 1 2 attribute of the received packet addressed Oite MN 2 can not be identified, the preset differential ortho CoA (the access line specified by the CoA) also functions as Defuoru preparative line selecting part for selecting.

The packet transfer unit 1 5 has a function of transferring (Rute queuing) based packets are received from the message processing unit 1 3 and Baketsuto processor 1 4 in the routing table (not shown).

In other words, these Baketsuto processor 1 4 and Baketsuto transfer unit 1 5, application de Isseki based on the identification result by the position information cache 1 1 the correspondence between a packet identifying unit 1 2 managed by transfer destination address information (CoA) determined, and functions as a data transfer processing unit for transferring the transfer destination address information (CoA) addressed determining the application data addressed to MN 2.

By implementing the function described above in HA 1, HA 1 is sub MN 2 is utilized - by determining CoA every bis application, the access line used to forward packets (Application de one data) it is possible to select. That is, the above-mentioned position information cache 1 1, the message processing unit 1 3, the packet processing unit 1 4 and Baketsuto transfer unit 1 5, based on the identification result by Baketsuto identifying unit 1 2 is used to transfer application cases Chillon data so that realizes the function of the access line selector for selecting access line.

On the other hand, MN 2 of the present embodiment, for example, as shown in FIG. 3, in addition to the above Intafue one scan 2 1, 2 2, 2 3, a packet identification unit 2 4, the mobility control unit 2 5, the packet processing part 2 6, the policy Ichide Isseki configured provided with a memory 2 7, and the application unit 2 8 like.

Here, the interface 2 1, 2 2, 2 3, intended to take a plurality of access lines to an interface (wireless LAN, PHS, 3G, various lines such as Bluetooth), for example, in evening face 2 1 a wireless LAN use (wireless LAN cards), interface 2 2 for PHS (PHS force one de), Intafue Ichisu 2 3 the ingredients if such a 3G (3G cards), provided for each type of access line MN 2 is utilized ing.

Packet identifying unit 2 4 analyzes the headers of these interfaces 2 1, 2 2, 2 3 packet received by, intended to identify the type, for example, received packets are located management message [HA router advertisement message temporarily from the position registration response message and AR 3 from 1: if (RA router advertisement), etc.], those receiving signal packets are processed is delivered to the mobility control unit 2 5, from CN 5 applique one Chillon data if the bucket Bok handed over to Baketsuto processing unit 2 6 has become cormorants'll be processed.

Mobility control unit 2 5 detects the movement of the MN 2, but has a function to generate the required position 耷 book message to be sent to the HA 1, in the present embodiment, a function unit, such as: It has both.

(L) HA l access times lines used in the de Isseki reception for each type of applique one Shonde Isseki for the assigned single MN 2 has a home address (HoA) by CoA (CoAl, CoA 2 , applique one Deployment by CoA creation unit (§ application specific line Adoresu information generating unit that creates a CoA3)) 2 5 1

(2) the CoA and the location registration message issuing unit that notifies the HA 1 by including the attributes co one de application de Isseki the location registration message addressed to HA 1 that receives using the CoA (first transfer destination Adoresu information notification unit) 2 5 2

Each CoA, for example, in the case of Mobile-IPv6, is prepared by combining Nettowa click prefix portion of the home address (upper 6 4 bits) and for each interface 2 1, 2 2, 2 3 and unique interface ID . In other words, the mobility control unit 2 5, by access lines available at the current position of the MN 2, Intafue Ichisu 2 1, 2 2 or attribute code § application data to be received by 2 3 corresponding to the access line and it're summer to register the HA 1 (notification) by correspondence between the location registration message to the address information (CoA) of the access line. Thus, the HA 1, it becomes possible to perform the registration, update and deletion of CoA for each combination of as described above MN 2 home address and (HoA) and attribute codes.

Incidentally, the present mobility control unit 2 5, in addition to the above, Le one WINCH optimizing section .2 5 3, the route change unit 2 5 4 and possible to obtain further Personalization functions as a port number negotiation unit 2 5 5 It can also be.

Here, the route optimization unit (first transfer destination address information designation unit) 2 5 3, upon receipt of the packet from HA 1, the CoA corresponding to the application type-specific identification result by the packet identifying unit 1 2 by by connexion notification (registration) in the location registration message to the CN 5, CN 5 to directly transmit packets addressed to MN 2 later addressed CoA of rather MN 2 (home address addressed to MN 2) HA 1 addressed and executes the Le Ichito optimized for transmission.

Also, the route changing section 2 5 4 upon receipt of the packet from HA 1, and notifies the HA 1 by CoA location registration message in response to the identification result of the application type by bucket preparative identification section 1 2 (registration) by, for the purpose to transmit a packet addressed to MN 2 which HA 1 receives from CN 5 subsequently addressed the CoA, thereby, MN 2 is even after the start of communication with the CN 5, the received packet change of access lines in accordance with the application Keshiyon type is made possible.

Further, the port number negotiation unit (classification information adjustment unit) 2 5 5 negotiates the port one port number to use for communication (type information applique one Nyon data to be'll start communication) with the CN 5 adjusts the use port number, for example, if the CN 5 is a streaming server, the negotiation is performed by RTSP (Real Time streaming Protocol), the information necessary to scan birds one timing reproducing such moving picture (play file information, port number, etc.) in summer as is obtained. Therefore, in this case, the location registration message issuing unit 2 5 2 described above, will be registered in the HA 1 by the location registration message with CoA the port number obtained in this way as an attribute code (notification).

Then, the packet processing unit 2 6, while passing the data to the applique one Deployment unit 2 8 decapsulates the application data packets arriving from CN 5, requires the transmission data generated by the Application areas one Chillon portion 2 8 It has a function of transmitting through in evening face 2 1, 2 2 or 2 3 encapsulated in accordance with the. Note that the application unit 2 8, corresponding to the interface 2 1, 2 2, 2 3 MN 2 is mounted, has at least, http, ftp, the application of various application type, such as voip.

Policy datum memory 2 7, for each application type, configured to store the policy data for determining whether to use any access line, when the mobility control unit 2 5 creates the location registration message with reference to this policy datum for each application type, to determine the CoA to be used, and summer to include the contents (attribute code).

In the example shown in FIG. 3, for example, as Isseki the policy de, MN 2 is in the priority of the wireless LAN → PHS → 3G if functions use http communication, when using the ftp is the PHS → wireless LAN → 3G in priority, respectively, using the access line (interface 2 1, 2 2, 2 3), data indicating the use of always 3G access line when utilizing voip (inter Hue Ichisu 2 3) stored in the policy datum memory 2 7. Note that this policy datum is the user, as appropriate, it can be set changes. Hereinafter, detailed operations of the mobile communication system of the present embodiment having the construction described above.

(Description of the operation of the AD HA

First, the operation of the HA1, will be described with reference to a flowchart shown in FIG. 1 1 and 12. Note that FIG. 11 is a location registration message processing, 12 denotes a packet transfer process.

(A 1-1) location registration message processing

As shown in FIG. 11, HA1 receives the location registration message from the MN 2 in message processor 13 (Step A 1), location based message processing unit 13 to the contents of the location registration message information cache 11 the entry of searching (HoA, attribute code, a set of CoA) (step A2), if there is no entry newly registered (step a 5 from NO route of step a 3), the E down birds if there is an entry It updates the contents (step a 4 from YES route of step a 3).

Thereafter, HA1 (message temporary processing unit 13) generates a position registration reply message temporarily destined MN 2 to the effect that position registration completion against the said location registration message, the location registration through the bucket-forwarding unit 15 sending a response message temporarily (step A6).

(A 1-2) the packet forwarding process

On the other hand, as shown in FIG. 12, when receiving a packet addressed to MN 2 (Step A

11), HA1, at Baketsuto identifying unit 12 de Isseki attribute of the received packet (Abu RIQUET one Chillon type) is determined from the port number, etc. of the received packet (step A

12), the packet processing unit 14 searches the position information cache 11 as a search key the destination address of the received Baketsuto (Step A 13).

As a result, if there is no corresponding entry, the packet processing unit 14 discards the received packet (or home link transmitted without encapsulation) to one (Step A 15 from NO route at Step A 14), the corresponding entry is if present, further, it searches the positional information Kiya' shoe 11 to the upper Symbol destination Adoresu and data attribute of the received Baketsuto as a search key (step A16 from the YES route of step A14).

By the search, if there is a corresponding entry, the packet processing unit 14 transfers through the packet transfer unit 15 encapsulates the received packet in CoA of the E entry (from YES route of step A 17 A 18). On the other hand, (unless the value of the corresponding de Isseki attribute is registered) If there is no corresponding entry, bucket Bok processing unit 14, receive the default CoA of the plurality of CoA (e.g., CoAl for http) the packet encapsulates and transfers through the packet transfer unit 15 (from the NO route of step A1 7 A19).

(A2) MN description of the operation of the

Next, the operation of MN2, will be described with reference to the flowchart shown in FIGS. 13 and 14. Note that FIG. 13 shows the location registration message transmission process when moving, 1 4 the location registration message transmission process when voip communication respectively. Further, the process shown in FIG. 13 is performed to the interface 21, 22, each 23.

(A 2-1) location registration message transmission process when the mobile

As shown in FIG. 13, MN2 receives the nearest AR3 to Le Isseki advertisement message (step B 1), the mobility management unit 25, the prefix portion of the local link contained in the route evening advertisement message one di determining whether MN2 by checking whether it up is different from the prefix portion of the route has been received evening advertisement message temporarily moves to another AR 3 under the link (step B 2, B 3).

As a result, the movement of the MN 2 is detected, the mobility management unit 25 searches the policy datum of the policy datum memory 27 (Sutetsu flops B4 from YES route of step B 3), which in the evening Hue Ichisu 21, 22, 23 and selecting whether to use (access line type) to the communication of which Abu publication notifies the HA 1.

In the example shown for example in FIG. 3, when you search policy data, For the http communication, a wireless LAN card 21 first priority, a PHS card 22 second priority respectively using 3G cards in the third priority for the voip, since information that a 3G card 23 used in the first priority (otherwise not used) is obtained, the mobility management unit 25, when moving to the area for wireless LAN, wireless LAN As used the card 21] ittp communication, but it is understood that not used for voip communication.

Therefore, the mobility management unit 25, when performing a location registration from Eria wireless LAN, and generates a CoAl corresponding to the wireless LAN force one de 21 (step B 5), correspondence between the CoAl and data attributes (http) the will be transmitted included in the location registration message temporarily addressed HA 1 (step B 6). Incidentally, if the movement of the MN 2 is not detected, not carried out generation and transmission of location registration message, then the router advertisement message is in a standby state until the received (NO route in step B 3).

(A2-2) a location registration message transmission process when the mobile

On the other hand, FIG. 14, because the port number is determined during voip communication start represents a process for registering the port number to the HA 1 when the port number is found as the data attribute information. That, MN2 may establish Suruga the voip session prior to the start of communication, because the port number is determined to be used in this case between the terminals (between MN2- CN5), the mobility management unit 25, a monitor that information keep (step B 1 1~B 13). Thus, Runode be found port number used by the communication started from now, the mobility management unit 25, see 'Search Isseki policy de (Step B 14) to which access lines during voip communication (interface 21, 22, 23) or the determination and selection to use.

The mobility control unit 25 (in the example of FIG. 3 3G force one de 23) the selected interface generates CoA3 corresponding to the location registration addressed HA 1 the correspondence between the CoA3 and data attributes (voip) It sending included in the message (step B 15). Figure 1 5 shows a format example of a location registration message in this case. It is shown to Fomatsuto in FIG. 15, the packet Four pine Bok in Mobile-IPv6, as a basic structure, IPv6 header 71, has a mobility header 72 and Authentication Header 74, the mobility management unit 25, IPv6 header 71 to the HA 1 as a destination address an address and a CoA as the source address stored respectively, (in this example, 1500) the port number used by voip communication was added and the CoA as a sub option 73 mobility header 72 position It generates and transmits a registration message 7.

Note that the "default flag" in the sub-option 73, the location registration message - a CoA to be registered with di 7 is information indicating whether or not to specify a default destination, HA1 Dede Isseki attribute of judgment If you can not, be specified in order to transfer it encapsulates the default destination. For example, it indicates that specified by "1", indicating that no designated by "0". Further, the above example, but MN 2 is an example of notifying the use port number in voip communications HA 1, the voip session between MN 2-CN 5 in the same manner as described above with HA 1 side and Moni evening it is also possible to know the port number to be used for voip communication.

(A 3) Entire System Operation

Then, assuming the operation of the HA 1 and MN 2 described above, an example of the operation of the entire system will be described with reference to FIGS. 4 to 1 0.

First, as shown in FIG. 4, in the 3G mobile communication network 8, a case where two wireless LAN 9 1, is 9-2 area exists. In this case, MN 2 is the 3G mobile communications network 8 AR 3- 2 (Le Isseki number "21"), the wireless LAN 9- 1 AR 3- 1 (router number "11"), the wireless LAN 9-2 and summer to be accessible via the respective AR 3- 3 (router number "12"). Further, the MN 2, Intafu ace 2 1, 2 3 are mounted, the interface 2 1 wireless LAN card, interface 2 3 a 3G card. However, MN 2 can determine interfaces 2 1 and 2 2 are any type of card, also knows what interfaces 2 1, 2 3 is good to use a per Apurikeshi Yon .

Then, MN 2, as described above with reference to FIG. 1 3, AR 3- 1 receives the route evening advertisement message temporarily periodically transmitted by the wireless LAN card 2 1 (Step S 1), the contents (prefix by confirming the partial presence or absence of a change in), it is determined whether or not moved to a different AR 3 under the local link as before. When the movement is confirmed, MN 2 refers and searching the policy data by the mobility control unit 2 5. Now, Runode the policy data is registered wireless LAN card 2 1 as a first priority, the mobility control unit 2 5 determines and with the wireless LAN card 2 1 use interface, the wireless LAN card 2 1 It generates a CoA (CoAll) corresponding to (scan Tetsupu S 2), and generates a position registration message 7 which includes a said CoAll and HoA and Apurike one Deployment type is transmitted to HA 1 (step S 3) .

Specifically, the mobility control unit 2 5, for example, as shown in FIG. 5, IPv6 header 71 of the destination Adoresu as HA 1 address, the CoAll and sets, respectively it as a source Adoresu, mobility header 7 including CoAll in 2, and newly creates a model Piritihedda 7 2 suboptions 7 3 (in this example, http) there applique one Deployment species specific and the value of the CoA to be used by the application (CoAll ) and including, generates a location registration message 7 destined HA 1 (7 a). Incidentally, the sub-option 7 3 "Default flag" in this example is set to "1", by this, default destination if you can not attribute determined by HA 1 is included in the location registration message 7 A CoAll to become.

In HA 1, upon receiving a location registration message temporarily 7 A above, the message processing unit 1 3, registers Z update data (Ento Li) in the position information cache 1 1 itself according to its contents (Step S 4) .

On the other hand, MN 2, when located in the AR 3- 2 under the area of ​​3G mobile communication network 8 may receive a router advertisement message temporarily by 3G card 2 3 from the AR 3- 2 (Step S 5 ) it is, in that case, the processing for the wireless LAN card 2 1 above independently (in parallel), as well as the location registration process for the 3G card 2 3 rows Nau.

That is, the mobility control unit 2 5 generates a CoA21 for 3G card 2 3 (Step S 6), for example, as shown in FIG. 6, the address HA 1 as a destination address in the IPv6 header 71, the as the source address and sets each CoA21, the CoA21 included in the mobility header 7 2, and newly creates a sub-option 7 3 mobility header 7 2, wherein the application type (in this example, voip) in and, the application in, including the value of the CoA to be used (CoA21), generates and transmits a location registration message temporarily 7 destined HA 1 (7 B) (step S 7). However, in this case, the "default flag" of the sub-options 7 3 is set to "0". Thus, the HA 1, the message processing unit 1 3, registered to Z update data (entry) to the position information cache 1 1 itself in accordance with the contents of the position registration message one di 7 B (Step S 8).

In this way, HA 1 creates the position information cache 1 1. Figure 7 shows an example of registration of the position information cache 1 1. As shown in FIG. 7, the position information Canon Mesh 1 1, the home address MN 2 (HoA), a port number, CoA, are set such lifetime (in seconds) is registered, the home address (HoA = 2002 :: Search has become a possible 100) and the port one 'port number as a search key. Even Mobile-IPv6 in other items exist, but that shows only operative association of high principal elements of the embodiment in FIG. 7.

And here using a "port" to identify the application type, in this example, port one port number = 80, port number = 1500 as an attribute co one de illustrating a voip is registered as an attribute code indicating ttp ing. Note that the port number = 0 is the default transfer destination (wireless LAN: CoAll = 2050 :: l00) shows the entries, all Isseki de inconsistent with other ports one bets number of this port number = 0 so that the transfer destination is determined in accordance with the entry. Other port numbers, Ru Monogaa shown example in the following Table 1.

Table 1 application and port number

Further, in the voip communication, as described above, at the start of communication, because the port one port number is assigned by the negotiation of the communication counterpart (CN 5) and the network 8, wherein the port number = 1500 by the Negoshieshiyon assignment It shows the Kinorei and was. "Lifetime" is the effective time of each entry represents a (second), when the "lifetime" expires, the entry is deleted. When communicating is typically location registration process again before the expiration of "lifetime" of this is executed, an entry is prevented that you missed.

Then, as http communication port number = 80 Akuse scan line used in (Web access) (the transfer destination of a packet from the web server 4), CoAll = 2050 :: 100 is registered, the port number = 1500 voip as an access line to be used for communication (telephone call) (transfer destination voip packets), CoA21 = 2100 :: 100 are registered.

Well, then, in terms of location registration processing as described above has been completed, the operation of transferring the packet from the HA 1 to MN 2, will be described with reference to FIG. As shown in FIG. 8, MN 2 is A request for data to the web server 4, the web server 4, in response thereto sending a home address (HoA) packets addressed to the MN 2 (Sutetsu flop SI 1 ). Here, the home address (HoA) because is destined home link address HA 1, delivered to the home link HA 1, which HA 1 is inter one sepsis Tosuru.

At this time, the HA 1, the packet identification unit 1 2, by analysis of the packet header can be determined that the packet is a data http. That is, since the port number = 80 indicating that the data of the http is written in the port number field in the TCP header, it is possible to specify the application type is by reference.

Then, HA 1 is the packet processor 1 4, CoAll as a search key and apps Keshiyon type identified with the HoA (http), in Rukoto to retrieve the location information cache 1 1, as the destination address of the MN 2 the obtained (step S 1 2) so transmits the encapsulated the original packet received from the web server 4 to the CoAll as a destination by the packet processor 1 4 (step S 1 3). Here, CoAll, since a CoA to be used in the link under AR 3- 1, this packet (http data) delivered to MN 2 via link wireless LAN 9-1, the wireless LAN card 2 1 MN 2 It will be received by.

Similarly, voip packet transmitted from CN 5 to the http data the same time is intercepted by HA 1 (Step S 1 4), HA 1 is the packet identifying unit 1 2, analyzing the Baketsutohedda in the packet identifies that the voip buckets bets, the packet processor 1 4, as a search key and Abu Rikeshiyon type identified with the HoA (voip), by searching the location information cache 1 1, obtaining CoA21 as the current position information of the MN 2 (step S 1 5). By the original packet (voip packet) packet processor 1 4 received from CN 5 The CoA21 as a destination and transmits the encapsulated (Sutetsu flop S 1 6). Here, CoA21, since a CoA to be used in the link AR 3- 2, the voip packets are delivered to MN 2 via 3G mobile communication network 8, 3G force of MN 2 - be received by de 2 3 become.

In this manner, in the present embodiment, for each application, it is possible to receive packets via the § click Seth network MN 2 wants. Then, the MN 2 shown in Fig. 9 from the state shown in FIG. 8 moves to the right direction in the drawing, and out of the area of ​​the radio LAN9- 1. In this case, MN2 is via a wireless LAN card 21, that the radio LAN9- 1 link is no longer available at the mobility control unit 25, for example, to detect the RSSI information (step S 21), the wireless LAN since CoAll that was assigned to the card 21 is not available, processing for changing (handover) to the 3G mobile communication network side receives Lou Bok of http data from the wireless LAN 9-1 side from Webusa server 4.

That, MN2 (mobility control unit 25) is configured to disable CoAll, with reference to the policy datum, to determine the next highest priority 3G wireless LAN as an access line, location registration message addressed to HA 1 by 7, the destination of the http data is changed to 3 G mobile active are used in the communication network 8 CoA21 (this time, even Defuoru-forwarding destination is changed to CoA21; step S 23, S 24). In this manner, MN 2 is used to sequentially select the best one among the possible access networks use at the time.

Thereafter, as shown in FIG. 10, further the MN 2 enters the another wireless LAN9- 2 area moves rightward on the paper surface. MN2 (mobility control unit 25) by receiving a router advertisement message that is periodically sent from AR3- 3 (step S 25), to detect the movement of the MN 2 as described above, for the wireless LAN card 21 It generates a new CoA12 (step S 26), the location registration message 7 it is registered in the position information cache 11 of HA1 (step S 27, S 28).

In the above example it is imparted policy datum to MN 2 side, but all or part of the policy de Isseki may be previously registered in the HA 1 or another server or the like. In this case, MN2 may simply notify the CoA which varies with the movement to the HA1, the H A1 accesses the policy de Isseki in a self or other server or the like, with a CoA to be used with application Keshiyon type it is sufficient to determine the relationship.

(A4) Description of First Modification

In the above example, CN5 is transmitting MN addressed packets always the MN 2 of 2 to Homuadore scan link (HA1), if applicable route optimization features Mobile-IPv6, through the HA 1 it is possible to communicate to the MN 2 and the direct without. At that time, with respect to MN2 from CN5, if the notification of the CoA to be used in the packet reception in the MN 2, after packet reception, that is, becomes later start of communication, and can be specified access line to be used for packet reception (change) of .

Hereinafter, such operations will be described with reference to a sequence diagram shown in FIG. 16. However, in this FIG. 16, the operation to indicate at Step S 1~S 8, SI 4, SI 5, S 16, unless otherwise specified in aforementioned operation of the same or similar way to FIG. 4 and FIG. 8 is there.

First, CN5 is, in order to initiate communication with the MN 2, contact a DNS (Domain Name System) of the MN 2 in such a home address (HoA) (query transmission), acquires the home address of the MN 2 (Step S 14 ', S 15'), and transmits the Baketsuto the acquired home address addressed (step S 14). This Baketsuto, as described above, are encapsulated in HA 1 (step S 15), and transmitted to the MN 2 (step S 16).

MN2 is sent encapsulated in this HA1, upon receiving the CN5 for transmit packets (voip packet) (step S 16), triggered by the reception of the packet, the data attribute of the received packet (voip) identifies the packet identification section 2 4 (at this time, can be seen address CN 5 by referring to the source address of the received packet), the route optimization unit 253, the packets of the de Isseki attribute, thereafter, to notify whether you want to receive via any access line to CN 5 by the position registration Messe temporary for route optimization.

For example, MN2 is, if you want to receive a packet from CN 5 via access lines 3G mobile communication network 8 by 3G cards 23, MN2, including CoA21 the location registration message for route optimization CN 5 sent to (step S

CN5 receives the location registration message, the location information cache (not shown) which is same as the self as in HA1 manages to register and update the CoA (CoA2l) included in the message (Step S 33 ), thereafter, the data packet destined MN2 is transmitted to CoA21 not the home address (step S 34). In this way, MN2 may determine the data attribute of the packet a packet received from CN 5 the (incoming) triggered, the address information of the desired access times line in accordance with the data attribute (CoA) to the CN 5 by notified, CN 5 which has received this notification, the subsequent destination of packets, it is possible to change the access addressed line notified from the MN 2.

(A5) Description of Second Modification

Then, after the start of communication between the MN2 and CN5, for another operation example in which MN 2 designates a § access line used for reception of the packet it will be described with reference to a sequence diagram shown in FIG. 17. However, in FIG. 17, Step S 1~S 8, S 14~S 16, S 14 ', SI 5' operation shown in, unless otherwise indicated, Figure 4, the more above in FIGS. 8 and 16 operation and are the same or similar.

First, in this case, CN5 is, you and transmitting the data packet to the MN 2 in ftp (step S 14). In this case, HA1 is in the position information cache 11, since the CoA of the data attributes (ftp) is not registered, and encapsulates the received packet with the default destination CoA (CoAll) performs Baketsuto transfer to MN2 ( scan Tetsupu S 16). Thus, the MN2, so that the packet by ftp from CN 5 via the wireless LAN by the wireless LAN card 21 is received.

MN2 is triggered by reception of the packet, seen the data attribute of the received packet (ftp) identified by the packet identification unit 24 (at this time, also the reference address of CN 5 by the transmission Mota dress of the received packet ), the root change unit 254, a packet of the data attributes, hereinafter, you want to receive via any access line Le - notifies the HA 1 by the location registration message for bets optimization.

For example, when you want to receive a packet of CN 5 or found via access lines 3G mobile communication network 8 by 3G cards 23, MN2 sends including CoA21 in the location registration message addressed to HA1 (step S 31, S 32 ').

HA 1 receives the position registration message temporarily above, the position information cache 11, and registers the set of data attributes included in the message (ftp) and CoA (CoA21) (addition) (step S 33), Thereafter, the encapsulated de one tapa packets destined MN2 received from CN5 (steps S 34 ') in CoA21 transferred to MN 2 (scan Tetsupu S 34) o Thus, in this modification, MN 2 is determines de Isseki attribute of the Baketsuto as a response to a packet incoming from CN 5, by notifying the desired access line address information corresponding to the data attribute (CoA) to HA 1, the notification HA 1 that it receives, it is possible to change the subsequent data transfer destination in accordance with the notification content.

(A 6) Description of Third Modification

Next, MN 2 accesses the streaming server as CN 5, Streaming [while downloading the de Isseki with this to perform content (motion picture) reproduction] An operation example of the case of receiving a mono screw, FIG. It will be described with reference to the sequence diagram shown in 1 8. However, this also in FIG. 1 8, the operation shown at step S 1 to S 8, the same or similar to the aforementioned operation by FIGS. 4 and 8.

In this case, MN 2, first, the port number negotiation unit 2 5 5 starts string one timing server 5 and RTSP (Real Time Streaming Protocol) session (Step S 4 1), necessary information (reproduction file by RTSP information, performs a negotiation port number, etc.) (step S 4 2), for example, acquires the port number = 355.

Then, MN 2, for example, when you want to be string one timing service using 3G card 2 3 (Step S 4 3), connexion by the function of the location registration message issuing unit 2 5 2, and HoA, 3G card 2 to CoA21 corresponding to 3, the port number (data attributes) = 355 obtained Ri by the above negotiation, sends a location registration message temporarily including the default flag = 0 addressed HA 1 (step S 4 4) .

HA 1 receives the position registration message, updating and registering a set of HoA and CoA21 and port number = 355 included in the message to the position information cache 1 1 (Step S 4 5). Thereafter, MN 2 is string one by RTSP Mindasa - sends a reproduction start instruction to server 5 (Step S 4 6), the streaming server 5 have received the playback start instruction, de one Tapaketto the port number = 355 in transmitting to the home address of the MN 2 (step S 4 7).

Then, the data packet is received by the HA 1, HA 1 is obtains the HoA and port number = 355 of the received packet and search for the position information cache 1 1 in the keys, the corresponding CoA21 and transfers to encapsulate the received packet in the CoA21. Thus, the packet is received by the 3G card 23 MN 2 in access lines through reason of 3G mobile communication network 8 (step S48, S49).

Thus, in the present modified example, (in this example, the port number to be used for streaming packet reception) identification information of the data attributes to be used between the MN2 and CN5 is adjusted before starting communication, MN2 is communication with the data attributes after adjustment of the de Isseki attribute identifier correspondence between Adoresu information of a desired access line by notifying the HA 1, the CN 5 using the desired access line corresponding to the data attribute it is possible to be performed.

[B] Description of Second Embodiment

Next, FIG. 19 is a block diagram showing a configuration of a mobile communication system according to a second embodiment of the present invention, the mobile communication system shown in FIG. 19 also, the home agent node having a home agent function in the Mobile-IPv6 (HA) 1 a, the mobile terminal (MN) 2 a having a client function in the mobile-IPv6, MN 2 a is on the Internet can be accessed by a wireless router (AR) 3- 1, 3- 2, 3-3, MN2 web server 4 that provides a web service (content delivery service) in a, MN2 a is voip and ftp predetermined protocol by will communicate row corresponding node, such as (CN) 5 and MN 2 a file by ftp, etc. It is configured to include the file server 6 or the like to provide a transfer service.

Here, HA 1 a is, in the present embodiment, MN2 a position information cache (Binding Cache) destination Adoresu the (CoA) of the managed by 11 a, the above Webusa - server 4 and CN 5, the file server 6 Upon receiving the packets destined for MN 2 sent addressed HA 1 from the ability to transfer the encapsulated by the latest CoA of M N2 a being managed the packet position information cache 11 to MN 2 a by also to be with the.

However, in the present embodiment, the HAl a (positional information cache 1 1), unlike the first embodiment, http that one MN 2 a may utilize, ftp, voip like Sa - type bis application (de Isseki attribute) separately, it manages the HoA (HoAl, HoA2, HoA3), and summer to manage them HoA separately CoA (CoAl, CoA2, CoA3). That is, in the present embodiment, as can be registered one MN 2 a diary multiple HoA by application is treat as identification information for these HoA data attributes (attribute code). Thus, HA la is, in effect, the MN 2 a is enabled to determine the CoA for each service application to be used. However, the HoA above, MN 2 a is set by registering the HoA to be application separately used.

When the packet addressed to MN 2 a arrives at the HA 1 a is HA la forwards encapsulated in the corresponding HoA searches the position information cache 1 1 a on the basis of the destination address of the packet. Function of such HA 1 a is the same or similar to the existing functionality, but that it more content managed by the single MN 2 a diary HoA position information cache 1 1 a is primarily differ only Thus, MN 2 a, as in the first embodiment, the web server 4 and the CN 5 by specifying the using application separately which access lines Daehwa, it is possible to communicate with the file server 6 or the like.

That is, the present embodiment, one of MN 2 a diary, assign multiple HoA, a method of communicating by changing the HoA per § applicator Chillon. Many communication from Cry Ann Bok, communication in a form that requests data to the server is started. Te the month, the server side the particular remote terminal is determined by looking at the packet of the data request. That is, the source Adoresu of Baketsuto the MN 2 a transmits, by transmitting set different HoA for each application, the server, one of the automatic multiple assigned to MN 2 a HoA specified by it's as possible out to transmit a packet addressed to MN 2 a.

Therefore, for the HA 1 a of this embodiment, in addition to the position information cache 1 la described above, it is sufficient that includes the existing HA identical or similar function, as shown in FIG. 2 0 In example embodiment, Baketsuto It constituted equipped identifying unit 1 2 a, message temporary processor 1 3 a, the packet processing unit 1 4 a and the packet transfer unit 1 5 a.

Here, Baketsuto identifying unit 1 2 a analyzes the header portion of the received Baketsuto, if those the received packet is its own node (HA la) whether the packet is addressed to a self node destined packets the reception whether bucket Bok is a control message such as a location registration message (Binding Update), as it has a function that identifies the like whether a packet addressed-MN 2 a (application Shonde Isseki) to is there.

Incidentally, in this Baketsuto identifying unit 1 2, the reception Baketsuto is identified as not a packet addressed to Jinoichido (HA 1 a), the received packet, the packet processing unit 1 4 a and bucket Bok transfer unit 1 5 through a is directly forwarded to another destination node, the received packet is identified as a location registration message addressed to its own node, the received packet is passed to the message processing unit 1 3 a, MN 2 Once identified as a packet addressed to a, the received packet is passed to the packet processing unit 1 4 a.

The message processing unit 1 3 a is the Baketsuto identifying unit 1 2 intended for processing a control message from a, current location information of MN 2 a corresponding control message included in the message if the location registration message (CoA ) registration and update and to the position information cache 1 1 a of, and has a function for deleting unnecessary CoA.

Packet processor 1 4 a receives a Baketsuto destined MN 2 a from Baketsuto identifying unit 1 2 a, with reference to the position information cache 1 1 a, searches the CoA corresponding to the HoA included in the packet, intended to have the ability to encapsulate Baketsuto by its CoA, Baketsuto encapsulated is delivered to Baketsuto transfer unit 1 5 a. The Baketsuto transfer unit 1 5 a are those having a function of transferring (routing) based on the packet received from the message processing unit 1 3 a and Baketsuto processor 1 4 a routing table (not shown).

On the other hand, MN 2 a of the present embodiment, for example, as shown in FIG. 2 1, interface 2 1 having a respective function equivalent to that of the first embodiment, 2 2, 2 3, the packet identification unit 2 4, and applique one Deployment Besides equipped with a part 2 8, and equipped with the mobility control unit 2 5 a, the packet processor 2 6 a and policy datum memory 2 7 a. It is assumed in the present embodiment, for example, the interface 2 1 for wireless LAN (Wireless LAN force once), interface 2 2 For PHS (PHS card) interface 2 3 for 3G and (3G cards).

Here, the mobility control unit 2 5 a detects the movement of the MN 2 a, but has a function of generating a base-out required location registration message be sent to the HA la, in the present embodiment, the following It has also combines functional unit, such as.

(DMN 2 a in available applique one Chillon type every HoA (HoAl, HoA2, HoA3) (assigns the mobile node identifier), access line (interface 2 1 respectively used to receive the packets of the application type, 2 2 , 2 3) of the CoA (CoAl, CoA 2, application-specific HoA creation unit that creates a CoA 3) (application-specific mobile node identifier assignment unit) 2 5 6

(2) determine the currently available interface 2 1, 2 2, 2 3 Allocated CoA, from the contents of the policy data in the policy data memory 2 7, use what CoA for each HoA (selected) CoA selecting section 2 5 7

(3) selected transmission between HoA and CoA HA to 1 a included in the location registration message addressed to HA 1 a (notification) to the location registration message issuing unit (second transfer destination address information notification unit) 2 5 8

In addition, the home address (HoA) is assigned to the cormorants I do not overlap between the HA 1 a and MN 2 a. At that time, to a network administrator or the like in some cases to assign a fixed value in advance with respect to MN 2, MN 2 a is sometimes automatically generated by a combination of a prefix and an interface ID of the home network. In either case, MN 2 a will select the one to use from among the HoA allocated available (this is the same in the first embodiment described above). In this case, the association between the application type and the HoA fixed also good Le ^ also to the mobility control unit 2 5 a is In addition, each as described above the same route optimization in the first embodiment part 2 5 3, the route and changing unit 2 5 4 and port number negotiation unit 2 5 5 may Rukoto includes a home address (HoA) selecting section 2 5 9.

Here, the home address selecting unit (mobile node identifier selection unit) 2 5 9, the HoA to the port number negotiation unit 2 5 5 According CN 5 and the port number obtained in the previous communication start by negotiation (application type) it is to select on the basis of the policy data. This case, the set of the CoA use § access line to the selected HoA is notified and registered in the HA la by the location registration message issuing unit 2 5 8 above.

Moreover, the policy data memory 2 7 a, for each application type, configured to store a policy datum for deciding whether to use the § click Seth line (HoA and interface 2 1, 2 2, 2 3) , when the Baketsuto processor 2 6 a to create a transmission Baketsuto is to refer to this policy datum for each application type, to determine the HoA to be used, sets it as the source address of the transmission packet and summer to.

In the example shown in FIG. 2 1 For example, the as a policy de Isseki, MN 2 a HoAl If performs http communication and wireless LAN → PHS → 3G access lines in priority (fin evening Fuesu 2 1, 2 2 , 2 3) was used to use the access line priority by HoA3 and PHS → wireless LAN → 3G when performing ftp communication, if performing voip communication HoA2 and 3G access line (interface 2 3) It is shown to Day evening that you use is stored in the policy de one data memory 2 7 a.

Then, the packet processing unit 2 6 a is received while the application data packet decapsulation pass data to the application unit 2 8, encapsulated as needed transmission de Isseki generated by the application unit 2 8 (packet those having a function of transmitting through the I interface 2 1, 2 2 or 2 3 of), where, as the source address of the packet transmitted from the application unit 2 8, whether to use any HoA, determined by referring to the policy datum of said policy data memory 2 7, which is the HoA in to create a transmission packet to the source address.

Also in this embodiment, CoA, for example, be created by combining the unique interface ID Nettowa one click prefix portion of the home address (upper 6 4 bits) for each interface 2 1, 2 2, 2 3 that.

The function of the above, in the present embodiment, MN 2 a is separately depending application type, it is possible to select and use the interfaces 2 1, 2 2, 2 3 to be used (access line). For example, when the MN 2 a to access the web server 4, using the HoA that you want to use in the http communication by requiring a file transfer to the Web server 4, the web server 4, the HoA you want to use the MN 2 a as the destination, and transmits the requested file.

Hereinafter, detailed operations of the mobile communication system of the second embodiment.

(B 1) Operation of HA First, the operation of HA la, furo one Chiya one preparative shown in FIGS. 29 and 30 will be described with more information. Note that FIG. 29 is a location registration message processing, FIG. 30 denotes a bucket-forwarding process.

(B 1-1) location registration message processing

As shown in FIG. 29, HAl a receives the location registration message from the MN 2 a in message processor 13 (step A21), the message processing section 13 is position information based on the content of those said location registration message searching cache 1 1 of the relevant entry (HoA and CoA set) (steps A22), if there is no entry newly registered (step a 25 from NO route at step a 23), the entry content if there is an entry updating (step a 24 from YES route of step a 23). Thereafter, HAl a (message processing unit 13) generates a position registration reply message destined MN 2 to the effect that position registration completion to pair with the location registration message temporarily, the location registration through packets transfer section 15 sending a response message temporarily (step A2 6).

(B 1-2) Baketsuto transfer process

On the other hand, as shown in FIG. 30, when receiving a packet addressed to MN 2 a (step A31), HA 1 a is the packet processing section 14, the position information cache 1 1 destination Adoresu reception Baketsuto as a search key Search (step a 32), if there is no corresponding E down birds, discards the received packet (step a 34 from NO route at step a 33) (or home sent to link without encapsulation) to one, the corresponding if there is E entry, step a from YES route of encapsulating received Baketsuto in CoA of the entry to transfer through the packetized Tsu Bok transfer section 15 (step a 33

(B 2) MN description of the operation of the

Next, the operation of the MN2 a, will be described with reference to a flowchart shown in FIG. 31. Incidentally, FIG. 31 shows a location registration message transmission process when moving, I interface 21, 22, 23 are performed separately.

MN2 receives the route evening advertisement message from the nearest AR 3 (step B 21), the mobility management unit 25 a, a router advertisement prefix portion of the local link included in the router advertisement message is received until then MN 2 a by verifying whether is different from the prefix portion of the message determines whether or not to move to another AR 3 under the link (step B 2 2, B 2 3). As a result, the movement of the MN 2 a is detected, the mobility control unit 2 5 a searches the policy de Isseki policy de Isseki memory 2 7 a (Step B 2 3 of YES route or al Step B 2 4), whether to use any HoA for communication which application to select a constant.

In the example shown for example in FIG. 2 1, searching for policy data, HoAl the http communication, the ftp communication using HoA2 to HoA3, voip communication, further, the http communication wireless LAN card 2 1 second 1 priority, a PHS card 2 2 second priority, using respectively the 3G card in the third priority, the first priority to the PHS card 2 2 at ftp communication, a wireless LAN card 2 1 second priority, the 3G card 2 3 respectively used in the third priority, because it uses 3G card 2 3 in the first priority in voip information that (otherwise not used) is obtained, the mobility control unit 2 5 a is the area available wireless LAN when moving is used HoAl and wireless LAN force one de 2 1 http communication, it can be seen that not used for voip communication.

Therefore, the mobility control unit 2 5 a is, if performing the location registration from the wireless LAN area, generates a CoAl corresponding to the wireless LAN card 2 1 (Step B 2 5), HA 1 that is referred to as source Adoresu HoAl It will be transmitted, including the CoAl the location registration message addressed to a (step B 2 6). Incidentally, if the movement of the MN 2 a has failed is detected, not carried out generation and transmission of location registration message, then enters a standby state until the router advertisement message is received (NO route in step B 2 3) .

(B 3) Entire System Operation

Then, assuming the operation of the HA 1 a and MN 2 a as described above, the overall system Operating Example will be described with reference to FIG. 2 to FIG. 2 8.

First, also in this embodiment, as shown in FIG. 2 2, in the 3G mobile communication network 8, a case where two wireless LAN 9 1, is 9-2 area exists. Also in this case, MN 2 a is, AR 3- 2 in the 3G mobile communication network 8 (router number "21"), the non-linear LAN 9- 1 AR 3 - 1 (router number "11"), the wireless LAN 9-2 can be accessed via the respective AR 3 -3 (Le Isseki number "12"). Further, the MN2 a, are in evening face 21, 23 is mounted, for example, interface 21 wireless LAN card, interface 23 and 3 G card.

However, MN2 a can determine whether interface 21 and 22 are any type of card, and how the interface 21, 2 3 to use knows how good each application. Further, MN2 are two home address HoAl and HoA2 is assigned to a, using the HoA 1 in web access Oittp communication), use HoA2 for voice calls (voip communication), the HoAl Other communications It has been decided to use as the default.

Then, MN2 a, as described above with reference to FIG. 31, AR3- 1 receives the router advertisement message output feed periodically by the wireless LAN card 21 (step S 51), the presence or absence of a change in its content (prefix portion ) by checking the, it is determined whether or not to move in a different AR 3 under the control of the local link in Sorema. When the movement is confirmed, MN2 a refers * search policy Ichide Isseki by the mobility control unit 25 a.

Now, the policy data Runode wireless LAN card 21 has been registered as a first priority, the mobility management unit 25 a determines respectively the wireless LAN card 21 and HoAl as used fin Tafuesu and HoA, the wireless LAN generates a CoA (CoAll) that corresponds to the card 21 (step S 52), generates a location registration message including a HoAl a source address the CoAll to transmitted to HA 1 a (step S 53).

Specifically, the mobility management unit 25 a, for example, as shown in FIG. 23, HA 1 a of address as the destination Adoresu the IPv6 header 71, and sets the CoAll respectively as the source Adoresu, HoAl the mobility header 72 and including CoAll, it generates a location registration message temporarily 7 destined HA 1 (7 C). In HAl a, when receiving the position registration message 7 C, the message processing section 13, registration Z further to new data (entry) to the position information cache 11 a of its own in accordance with the contents (step S 54).

On the other hand, MN2 a, if you are located in AR 3- 2 under the area of ​​3G mobile communication network 8 may receive the 3G card 2 3 a router advertisement message from the AR 3- 2 (Step S 5 5 ) it is, in that case, the processing with the wireless LAN card 2 1 above independently (in parallel), as well as perform the location registration processing for the 3G card 2 3.

That is, the mobility control unit 2 5 a generates CoA21 for 3G card 2 3 (Sutetsu flop S 5 6), for example, as shown in FIG. 2 4, address HA 1 as a destination address in the IPv6 header 71, transmission When each setting the CoA21 as source address and monitor, including HoA2 and CoA21 the mobility header 7 2, generates a position registration message 7 destined HA 1 a (7 D) 'transmits (step S 5 7 ). In HA 1 a, the message processing unit 1 3, registers Z update data (entry) on its own position information cache 1 1 a according to the contents of the position registration message 7 D (Step S 5 8).

In this way, HA la creates the position information cache 1 1 a. 2 5 illustrates an example of registration of the positional information cache 1 1 a. As shown in FIG. 2 5, position information cache: The L 1 a, home address MN 2 (HoA), CoA, are set such lifetime (in seconds) is registered, the search key the home address (HoA) has become can be searched as. In FIG. 2 5, the first entry, HoAl for http communication = 2002: 01 "100, CoAll = 2050" 100, lifetime = 500 set of Defuoru-forwarding destination (s) of the (wireless LAN) is registered as an entry, a second entry, voip for communication HoA2 = 2002: 02 :: 100, CoA21 = 2100 :: 100, lifetime = 450 (in seconds) set indicates that it is registered.

Well, then, in terms of location registration processing as described above has been completed, the operation of transferring the packet from the HA la to MN 2 a, will be described with reference to FIG 6. As shown in FIG. 2 6, MN 2 a is, when request data used by the HoAl source address to the web server 4, the web server 4, in response thereto MN 2 a of home address ( HoAl) transmits a packet addressed to (http packet) (step S 6 1). Here, since the host one-time address (HoAl) is addressed to the home link address of the HA 1 a, delivered to the home link of the HA 1 a, this HA 1 a in-evening to Bok one sepsis. At this time, the HA 1 a, the packet identifying unit 1 2 and the packet processing unit 1 4, the source address of the received packet (HoAl) as the search keys, by searching the location information Kiyasshi Interview 1 1 a, MN since obtaining CoAll as the destination Adoresu of 2 a (scan Tetsupu S 6 2), a sediment Zinal packet received from the web server 4 to the CoAll as a destination by Baketsuto processor 1 4 transmits the encapsulation (step S 6 3 ). Here, CoAll, since a CoA to be used in AR 3 one 1 under the link, the packet (Isseki http De) is delivered to the MN 2 a via link wireless LAN 9-1, the MN 2 a radio It will be received by the LAN force one de 2 1.

Similarly, voip packets destined HoA2 transmitted from CN 5 to the http Baketsuto the same time also be intercepted by the HA 1 a (Step S 6 4), HA 1 a, the packet identification section 1 2 and packet processing the part 1 4, as a search key the HoA2, by searching the location information cache 1 1 a, obtain CoA21 as the destination Adore scan of MN 2 a (step S 6 5).

By the original packet (voip packet) packet processor 1 4 received from CN 5 The CoA21 as a destination and transmits the encapsulated (Sutetsu flop S 6 6). Here, CoA21, since a CoA to be used in the link AR 3- 2, that this voip Baketsuto is delivered to MN 2 a via 3G mobile communication network 8, is received by the 3G card 2 3 MN 2 a become.

In this manner, in the present embodiment, by using different HoA for each application without requiring major additions and changes to HA 1 a, as in the first embodiment, access network MN 2 a desire it is possible via receives a packet.

Next, MN 2 a as shown in FIG. 2 7 from the state shown in FIG. 2 6 is moved to the rightward direction of the paper surface, and out of the area of ​​the wireless LAN 9-1. In this case, MN 2 a is via a wireless LAN card 2 1, that the wireless LAN 9-1 link is no longer available at the mobility control unit 2 5 a, for example, to detect the RSSI information (step S 7 1), since the CoAll that was assigned to the wireless LAN force one de 2 1 is not available, the reception Le one bets http packet radio LAN 9 from Webusaba 4 - change the 3G mobile communication network side from a side (handover ) processing performed. That, MN2 a (mobility control unit 25 a) invalidates CoAll (step S 7 2), with reference to the policy Ichide Isseki, the next highest priority 3G wireless LAN as an access line determined, HA1 by the location registration message temporarily 7 addressed a, the transfer destination of the http packets, 3 G mobile to change to it are valid CoA21 that used in the communication network 8 (step S 73, S 74 Thus Te, MN 2 a is used to sequentially select the best one among the available access network at that time.

Thereafter, as shown in FIG. 28, a further MN2 has entered another wireless LAN9- 2 area moves rightward on the paper surface. MN2 (mobility control unit 25), (step S 85) by receiving Lou evening advertisement message is periodically transmitted from AR3- 3, to detect the movement of the MN 2 a as described above, the wireless LAN force generates a new CoA12 against once 21 (step S 86), Ri by it in the location registration message 7, to allocate the HoAl, registers the position information cache 11 a of HA1 a

(Step S 87, S 88).

Also in this embodiment, all or part of the policy data may be previously registered in the HAl a or another server or the like.

(B4) Description of First Modification

In the above example, CN5 is transmitting to the MN 2 a packet destined always MN 2 a Homua dress link (HA la), as in the first embodiment, Mobile-IPv6 Le one bets by applying the optimization, it is possible to communicate with MN 2 a and direct without using the HA 1 a. At that time, with respect to CN 5 from MN 2 a, if the notification of the CoA to be used for packet reception in MN2 a, after Baketsuto received, that is, after the start of communication, and can be specified access line to be used for packet reception Become. Hereinafter, such operations will be described with reference to a sequence diagram shown in FIG. 32. However, in FIG. 32, Step S 5 ;! The operation shown in ~ S 58, S 64, S 65, S 66, unless otherwise specified, properly are the same identical to aforementioned operation by FIGS. 22 and 26.

First, CN5 is, in order to initiate communication with the MN2 a, contact a DNS (Domain Name System) or the like to MN 2 a home address (HoAl) (query transmission), acquires the home address of MN2 a (step S 14 ', S 15'), and transmits the packet to the acquired g e beam address addressed (step S 64). This Baketsuto, as described above, are encapsulated in HA1 a (step S 65), is transmitted to the MN2 (step S 66).

MN2 a is sent encapsulated in this HA1 a, it receives the transmission packet CN5 (voip packets), as a response to the reception of the packet, determines the data attribute of the received packet, and thereafter, the packet of data attributes to determine desired received via any access line (step S 91), and notifies the CN 5 by the location registration message for route optimization it.

For example, MN2 a is, if you want to receive a packet from CN 5 with access lines through reason of 3G mobile communication network 8 by 3G cards 23, MN2 a is, HoAl the location registration message for route optimization, including CoA21 to sent to CN 5 (scan Tetsupu S 91, S 92).

CN5 receives the location registration message, the location information cache (not shown) which is same as the self as in HA1 a managed registers and updates HoAl, CoA21 included in the message (Step S 93 ), thereafter it transmits a data packet addressed to MN2 a bypassing the (HA1 a not the home address) addressed CoA21 da Irekuto (step S 94).

Thus, also in the present embodiment, MN2 a is, determines the attribute of the packet as a trigger packet received from CN5 (inbound), the address information (CoA) of the desired access line in accordance with the attribute by notifying the CN 5, CN5 is a subsequent destination of packets, it is possible to change the access addressed line notified from the MN 2.

(B 5) Description of Second Modification

Next, MN 2 after start of communication of a and CN 5, the another operation example of MN 2 a designates the access line Ru used for reception of packets, and describes the use of the sequence diagram shown in FIG. 33. However, in this FIG. 33, step 351~358, S 64 ~S 66, S 14 ', S 15' the operation shown in, unless otherwise indicated, Figure 22, already described operation and the 2 6 and 32 the same or similar.

First, in this case, it is CN 5, and transmits the data packet to the MN 2 a at ftp (step S 64). In this case, HA1 is in the position information cache 11 a, since the CoA of de Isseki attributes (ftp) is not registered, the received packet with the default destination CoA (CoAll) Kapuserui spoon to the MN 2 a performing the Baketsuto transfer (step S 16). Thus, the MN2 a, so that Baketsuto by ftp from CN 5 via wireless LAN is received by the wireless LAN card 21.

MN2 a, as a response to reception of the packet, the data attributes of the received packet (ftp) identified by the packet identification unit 24 (at this time, also the reference address of CN 5 by the source address of the received packet seen), Ri by the route change portion 254, a packet of the data attribute, thereafter notifies you want to receive via which access lines to CN 5 by the location registration message temporarily for route optimization.

For example, when you want to receive a packet of CN 5 or found via access lines 3G mobile communication network 8 by 3G cards 23, MN2 a transmits including CoA21 location registration message addressed to HAl a ( step S 91, S 92 ').

HAl a receives the location registration message, the location information cache 1 1, registering a set of HoAl and CoA21 included in the message (added) to (Step-up S 93), thereafter, it receives from the CN 5 is the MN 2 a destined de Isseki packet (Sutetsu flop S 94 ') and transfers encapsulated by the MN2 a in CoA21 (step S 94). Thus, in this modification, MN2 a is, 'as a response to a packet incoming from CN5 determines de Isseki attribute of the Baketsuto desired Akuse scan line address information according to the data attributes ( HoA, CoA) to that notifies the HA 1 a, HA1 a which receives the notification, it is possible to change the subsequent data transfer destination in accordance with the notification content.

(B 6) Description of Third Modification

Next, MN2 a accesses the string one timing server as CN 5, the operation example in the case of receiving the the streaming service will be described with reference to a sequence diagram shown in FIG. 34. However, even in this FIG. 34, the operation shown in step 351 to 358 are identical or similar to the aforementioned operation by FIGS. 22 and 26. In this case, MN 2 a selects a HoA (HoA3) used for receiving streaming data, and registers the position registration message temporarily 7 and CoA21 corresponding to the HoA3 and the HoA3 against HA 1 a (step S 1 0 1, S 1 0 2, S 1 0 3) o then, MN 2 a, using the HoA3 as a transmission (source) address of the outgoing messages from the MN 2 a, string one Mindasa one start the server 5 and RTSP session (step S 1 0 4), performs a negotiation necessary information by RTSP (reproduction file information, port number, etc.) (step S 1 0 5), for example, port number = 355 to get.

Then, MN 2 a sends a reproduction start instruction to the streaming server 5 by RTSP (Step S 1 0 6), streaming Dasa over server 5 having received the playback start instruction, the de one Tapaketto port one in port number = 355 MN 2 a home address (HoA3) is sent to (step S 1 0 7). The de Isseki Baketsuto is received by the HA 1 a, HA la acquires CoA21 searching for position information cache 1 1 a to the HoA (HoA3) in the received packet as a key, in the CoA21 It transfers the received packet to encapsulate. Thus, the packet is received by the 3G card 2 3 MN 2 a via access lines 3G mobile communication network 8 (Step S 1 0 8, S 1 0 9).

(C) effect

As described above, according to the present embodiment, MN requests (policy Ichide Isseki) and http, ftp, depending on the application type, such as voip, selectively using multiple § click Seth lines are simultaneously connected to the MN it is possible, it is possible to select the most suitable access line in accordance with the applique one Deployment type for packet forwarding. Therefore, to ensure quality required by Interview one The of MN, and it is possible to achieve effective use of the network.

Thus, for example, while only received by the wireless L AN line always not take the communication cost in the reception of the advertisement information, at the same time, de using the PHS line secured data quality - evening transmit and receive, realizing how such can do.

In addition, as another example, employees of a company, 3G force over time the only business use was observed have been paid from the company, also, the employees are also owned personally PHS card, home in the context of the personal computer (PC) can be used both the PHS card of 3G card and personal ownership of the company paid, home? When the web access for private use in C, but use the PHS card privately owned, always have also carried mail received for work, applications can be considered, such as using only the 3G card is in the mail check. In such applications, the policy one day evening setting, without considering the user to select the various access lines, it become possible to separately use the access line for each Abu Rikeshiyon.

Besides, by setting the policy data, for example, it is thought examples use the following.

• a certain user is in moving the highway, because the trouble of speech is interrupted during a call, but use the 3G network, while download at once video files drop in the service area in the case to see the video, while on the move data is insufficient and 3 G access is also used.

• The normal mail reception (small band) slow to use the line, to view the content and access to the attached URL in the e-mail, because it takes time to display in the low-speed line, (big band) Fast using the 3G network is a line. If, using the Wireless LAN If further high-speed Wireless LAN can use environment.

• If you have subscribed to flat-rate PHS service, use the sound quality is clear PHS line the most stable in a voice call, the other http communication, etc., use the line with extra Hiroshi to most bands depending on the location.

• proposal materials, etc. to the quote and customers, article sent troubled seen in other companies use a secure line other than the wireless LAN, otherwise use a wireless LAN.

Catalog browsing, but was using a wireless LAN, use the 3G network high confidentiality when you send personal information such as credit card numbers online shopping Bing.

• unsolicited advertisements receives only not to apply the fee line.

- 1 1 0 number to the emergency call and the police internal call of the report, etc., use a secure and reliable 3G network or PDC line.

· The telemedicine telesurgery like, using a highly reliable and stable 3G network or PDC line.

(D) Other

The present invention is not limited to the embodiments described above, it can naturally be modified in various ways deviating Shinare range from the spirit of the present invention.

For example, remembering function as HA as described above in the edge node may perform the transfer destination determining reception Baketsuto the (force encapsulation, etc.) in the edge node. Industrial Applicability

As described above in detail, according to the present invention, http, ftp, depending on the application type, such as voip, since it and this selectively using the plurality of access lines to be simultaneously connected to the mobile node, the mobile node Interview one to ensure quality the seek and it becomes possible to achieve effective use of Nettowa click, is considered to be extremely useful in the mobile communication field.

Claims

The scope of the claims
In 1. Mobile communication system in which a plurality of access lines equipped with mobile nodes which can be connected to a plurality of correspondent nodes simultaneously communicate simultaneously,
Based from the correspondent node to the type of § applicator Chillon data to be forwarded to the mobile Roh one de, an access line used for the transfer of the applique one Deployment data select,
Characterized in that the transfer of the application data on the selected access line, application handover method in a mobile communication system.
2. Equipped with a mobile management node to which the mobile communication system manages the data transfer path to the mobile node,
The mobility management node receives the application data destined for the mobile node to identify the type of the application data, and performs the selection of 該A access line based on the identification result, according range application handover method in a mobile communications system according to paragraph 1.
3. The mobile node, by an access line available at the current position, the mobile manages a correspondence relationship between destination Adoresu information specifying the applique one Shonde evening type information and said access line to be received in the § access line notify the node, the mobility management node, characterized in that the selection of the access line on the basis of the said relationship and identification result notified from the mobile node, according to claim 2, wherein Aburike one Deployment handover method in a mobile communication system.
4. The mobility management node, characterized in that managing the correspondence between the type information and said transfer destination § address information of the application data, the mobile communication system according to paragraph 2 or claim 3 applique one Deployment handover method in.
5. The mobile node, characterized by managing the correspondence between the type information and said transfer destination Adore scan information of the application data, in the mobile communication system according to paragraph 2 or claim 3 application handover method.
6. The mobile node as the destination address information, the address of the access line used for reception of the application data for each type of the application data to a single mobile node identifier assigned by the mobility management node information (hereinafter, referred to as the line address information) to generate, and notifies the set of the 該回 line address information and said § flop publication de Isseki type information to the mobility management node, the scope of the claims 3 application handover method in a mobile communication system according to claim.
7. The mobile node, assigns a plurality of mobile node identifiers for each type of the application data, as the transfer destination address information, the Apurikeshi address of the access line information used for reception of Yung data (hereinafter, the line address information generating a) that, and notifies the set of the said mobile node identifier and 該回 line address information by the movable dynamic management node, Apurikeshi a down in a mobile communication system according to claim 3 handover method.
8. The mobile node receives the application data from the correspondent node Then, to identify the type of the application de Isseki notifies the transfer destination Adoresu information corresponding to the identification result to the correspondent node,
The correspondent node, the application data destined later the mobile node, and transmits to the destination address information destined notified from the mobile node, claim 6 or paragraph 7 application handover method in a mobile communication system according.
9. The mobile node receives the application data from the correspondent node Then, to identify the type of the application data, and notifies the transfer destination Adoresu information corresponding to the identification result to the mobility management node, the mobile management nodes, the application data of the mobile addressed node received from the correspondent node after, and transmits to the destination Adoresu information Hoate notified from the mobile node, the scope of the claims application handover method in a mobile communications system according to paragraph 6 or paragraph 7.
1 0. The mobile node, after adjusting the type information Isseki § application de to be'll start a communication with the correspondent node, the mobile sets the with the type information and 該回 line Adoresu information and notifies the management node, application handover method in a mobile communication system according to claim 6.
1 1. The mobile node, after adjusting the type information § application data to be'll start a communication with the correspondent node, and select the moving Roh one de identifier for the type information, the mobile and notifying a set of the node identifier and 該回 line address information by the movable dynamic management node, application handover method in a mobile communication system according to claim 7.
1 2. The mobility management node, if the application de one evening type destined said mobile node receiving can not be identified, and selects the Defuoru bets access line which is set in advance of the access line , application handover method in a mobile communication system according to any one of claims second term - the first (1).
1 3. The mobility management node is a node having a home agent function in the thermopile IP, characterized in that the mobile node is a node having a client function in the thermopile IP, claim 2, second applique one Deployment handover method in a mobile communication system according to any force term of 1 binomial.
1 4. plurality of access lines are used in a mobile communication system having a mobile node capable of simultaneously connected to a plurality of correspondent nodes simultaneously communications, mobility management for managing the data evening transfer path to the mobile node a node,
And de Isseki type identifying means for identifying the type of the communication partner Nodoka et the mobile node § applicator Chillon de to be transferred to the addressed Isseki,
Based on the identification result by said data type identifying means and that you equipped the access line selecting means for selecting an access line used for the transfer of the applique one Deployment data, mobility management for use in a mobile communication system node.
1 5. The access line selecting means,
And § address information management means for managing a correspondence relationship between destination address information identifying the access line used to transfer type information and the applique one Shonde Isseki of the application data,
Determine the appropriate destination Adoresu information based on the identification result by the correspondence between the 該De Isseki type identification means managed by the Adoresu information management means, application addressed the mobile node from the communication partner node characterized in that the data is configured to include a data transferring unit that transfers the addressed to the destination address information, the mobility management node used in the mobile communication system according to the first item 4 claims.
1 6. The address information management means,
Corresponding to its specific access lines available at the current position coming notified from the mobile Roh one de, a transfer destination address information identifying the type information and the access line of the application data to be received in the access line in the mobile node characterized in that it includes a position information cache that holds a relationship, the mobility management node used in the mobile communication system according to the first 5 wherein the claims.
1 7. The position information cache,
As the correspondence between the address information of the access line used for reception of the application data generated in the mobile node for each type of the § application data evening for a single mobile Roh once identifier, the address the mobile Bruno with information - characterized in that it is configured to hold a set of the said application de Isseki type information notified from de, the mobile communication system according to the first item 6 claims mobility management node to be used.
1 8. The position information cache,
As the correspondence relationship is configured to hold a set of the one access line of the address information used for reception of the application data of the mobile node identifier assigned to the mobile node for each type of the application data characterized in that the mobile pipe Rinoichido used in a mobile communication system according to the first 6 wherein the claims.
1 9. The access line selecting means,
If an application de of Isseki type destined the mobile node received in the data type identification unit can not be identified, provided with a default line selection means for selecting a Deformation Le Bok access line which is set in advance of the access line wherein the mobility management node used in the mobile communication system according to any one of claims first item 4 - first Section 8.
2 0. Mobile communication system including a mobility management Roh one de plurality of access lines to manage the connected data transfer path to a plurality of correspondent nodes simultaneously communications capable mobile node and the mobile node at the same time a plurality of line fin evening face corresponding to said a mobile node, said plurality of Akusesu lines used for,
By access lines available at the current position, the moving relationship between destination Adoresu information specifying the type information and the Akuse scan line Apurike one Deployment data to be received by the line fin evening Fuesu corresponding to the access line characterized in that includes the mobility management unit that notifies the management node, the mobile node used in the mobile communication system.
2 1. The mobile management means,
As the transfer destination address information, the address of the access line information used for each of the application data type to the reception of the application Keshiyonde Isseki (hereinafter the mobile node identifier of the single assigned by the mobility management node, line and application circuit address information generation means for generating a) that address information, a first transfer destination address information notification means for notifying a set of the 該回 line Adoresu information and the type information of the application data to the mobile management node includes features that it has been constructed, the mobile node used in a mobile communication system according to the second 0 term the claims.
2 2. The mobile management means,
Both putting several mobile node identifier for each type of the application cases Chillon data, as the transfer destination address information, the address of the access line are use to the reception of the application data information (hereinafter, referred to as the line address information) application that generates and another node identifier generating means,
Characterized in that a set of the said mobile node identifier and 該回 line Adoresu information is configured to include a second transfer destination address information notification unit that notifies to the mobile management node, to the second 0 term claims the mobile node used in a mobile communication system according.
When 2 3. Upon receipt of the application de one data from said mobility management node, provided with a data evening type identifying means for identifying the type of the § Purike one Shonde evening and the mobile management means,
The 該De Isseki destination Adoresu information corresponding to the identification result by the identifying means, and notifies the application data of the following the mobile addressed node to the correspondent node to the correspondent node to be transmitted to the transfer destination address information characterized in that it is configured to include a first transfer destination Adoresu information specifying unit, the mobile node used in the mobile communication system according to any one of claims second 0 through section second binomial .
2 4. Upon receiving the applique one sucrose Ndeta via 該回 line interface from said mobility management node, provided with a de Isseki species-specific identification means for identifying a type of the application data, is the mobile management means,
The transfer destination Adoresu information corresponding to the identification result by said data type identifying means, the applique Shonde evening of the mobile Roh one de addressed to the mobility management node is received from the correspondent node after the addressed to the destination Adoresu information you characterized by being configured to include a notifying to the mobile management node 'second destination Adoresu information specifying unit to transmit, to any one of the second 0 through section second binomial claims the mobile node used in a mobile communication system according.
2 5. The mobile management means,
Includes type information adjusting means for adjusting the type information of the application de Isseki to be'll start a communication with the correspondent node,
First transfer destination Adoresu information notification means,
Characterized in that a set of the said type information and 該回 line Adoresu information after adjustment is configured to notify, to the mobile management node according to another information adjustment unit that species, the movement according to the second 1 wherein claims the mobile node used in a communication system.
2 6. The mobile management means,
Type information adjusting means for adjusting the type information of the application de Isseki to be'll start a communication with the correspondent node,
Includes a mobile node identifier selection means for selecting a mobile node identifier for the type information after adjustment by said species-specific information adjustment means,
Second transfer destination Adoresu information notification means,
Characterized in that a set of the mobile node identifier and 該回 line Adore scan information selected by the mobile node identifier selection means is configured to notify, to the mobile management node, according to the second item 2 claims the mobile node used in a mobile communication system.
PCT/JP2003/006252 2003-05-20 2003-05-20 Application handover method in mobile communication system, mobile management node used in the mobile communication system, and mobile node WO2004105272A1 (en)

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